Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
  • C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J2400/00—Presence of inorganic and organic materials
  • C09J2400/10—Presence of inorganic materials
  • C09J2400/14—Glass
  • C09J2400/146—Glass in the pretreated surface to be joined

Definitions

• This invention relates to adhesives for use in bonding together ceramics, particularly those destined for medical treatment, and/or in bonding them to other adherends and to processes for bonding ceramics, particularly those destined for medical treatment, together or bonding them to other adherends by the use of said adhesives.
• Ceramics of varied types have come to be used in a variety of industrial fields. Of these ceramics, those which are destined for medical treatment are expected to find their uses in such a field as the manufacture of artificial bone or dental treatment.
• Such ceramics destined for medical treatment as used in the field of dental treatment include dental porcelain materials (hereinafter simply called porcelain in certain cases) which consist essentially of silica or alumina and further contain modified oxides for improving melting point, sintering characteristics, color tone, etc.
• This porcelain has been used for manufacturing porcelain tooth, porcelain baked crown, jacket crown, etc. and, in addition thereto, utility as artificial tooth of the porcelain has now been under investigation.
• Dental treatment using such porcelain has heretofore been practiced, for example, by first making a metallic crown so as to fit a decayed tooth after removing by scraping the decayed portion therefrom, putting together by baking the porcelain and metallic crown to make a porcelain baked crown, and covering the tooth with the porcelain baked crown. ln that case, however, there was involved such problem that the porcelain used sometimes breaks into pieces because it is hard and brittle, or because of being poor in its adhesion to metal, the porcelain baked comes off from the metallic crown. Where the porcelain broke into pieces, in particular, there was brought about such problem that an expensive porcelain baked crown must be made anew because broken pieces of the porcelain cannot be strongly joined together.
• adhesives which are believed to have adhesiveness to porcelain.
• said adhesives comprising (i) silane coupling agents, (ii) polymerizable monomers such as 4-­methacryloxyethyltrimellitic acid anhydride (hereinafter called 4-META for short in certain cases), (iii) polymerizable monomers such as methyl methacrylate (hereinafter called MMA for short in certain cases) and (iv) polymerization catalysts such as tributylboron (hereinafter called TBB in certain cases).
• silane coupling agents such as 4-­methacryloxyethyltrimellitic acid anhydride (hereinafter called 4-META for short in certain cases)
• MMA methyl methacrylate
• TBB tributylboron
• the present invention is intended to solve problems associated with the prior art as mentioned above, and a first object of the invention is to provide adhesives having excellent properties of sticking to ceramics such as porcelain and also excellent in water resistance.
• a second object of the invention is to provide processes for the bonding of ceramics such as porcelain using adhesives as mentioned above.
• a characteristic feature of a first adhesive for ceramics according to the present invention is that the adhesive contains as its components (a) a silane coupling agent, (b-1) at least one first acidic compound selected from the group consisting of organic carboxylic acids, organic carboxylic acid anhydrides, inorganic acids, organic sulfonic acids and organic phosphoric acids (c) a polymerizable monomer and (d) a polymerization catalyst, said silane coupling agent being present in an amount of at least 5% by weight based on the sum total weight of said components (a), (b-1), (c) and (d).
• a silane coupling agent at least one first acidic compound selected from the group consisting of organic carboxylic acids, organic carboxylic acid anhydrides, inorganic acids, organic sulfonic acids and organic phosphoric acids
• c a polymerizable monomer
• a polymerization catalyst said silane coupling agent being present in an amount of at least 5% by weight based on the sum total weight of said components
• a characteristic feature of a second adhesive for ceramics according to the invention is that the adhesive contains as its components (a) a silane coupling agent, (b-­2) a metal salt, (c) polymerizable monomer and (d) a polymerization catalyst.
• a characteristic feature of a third adhesive for ceramics according to the invention is that the adhesive contains as its components (a) silane coupling agent, (b-2) a metal salt (b-3) at least one second acidic compound selected from the group consisting of organic carboxylic acids and organic carboxylic acid anhydrides, inorganic acids, organic sulfonic acids and organic phosphoric acids (c) a polymerizable monomer and (d) a polymerization catalyst.
• a third process of the invention for bonding ceramics to an adherend by the use of a liquid containing (a) a silane coupling agent and (b-2) a metal salt, and a mixture containing (c) polymerizable monomer and (d) a polymerization catalyst, has a characteristic feature that the process involves the following steps;
• a fourth process of the invention for bonding ceramics to an adherend by the use of a liquid containing (a) silane coupling agent and (b-2) a metal salt and a mixture containing (c) a polymerizable monomer, (d) a polymerization catalyst and (b-3) the aforesaid second acidic compound, has a characteristic feature that the process involves the following steps;
• a fifth process of the invention for bonding ceramics to an adherend by the use of a mixture containing (a) a silane coupling agent, (b-1) a metal salt, (b-2) the aforesaid second acidic compound if necessary, (c) a polymerizable monomer and (d) a polymerization catalyst, has a characteristic feature that the process involves the following steps;
• the adhesives for ceramics of the present invention as illustrated above are excellent in adhesion properties as well as in dependability and water resistance.
• the first adhesive for ceramics of the invention comprises (a) a silane coupling agent, (b-1) at least one first acidic compound selected from the group consisting of organic carboxylic acids, organic carboxylic acid anhydrides, inorganic acids, organic sulfonic acids and organic phosphoric acids, (c) a polymerizable monomer and (d) a polymerization catalyst.
• the second adhesive for ceramics of the invention comprises (a) a silane coupling agent, (b-2) a metal salt, (c) a polymerizable monomer and (c) a polymerization catalyst.
• the third adhesive for ceramics of the invention contains (b-3) at least one second acidic compound selected from the group consisting of organic carboxylic acids and organic carboxylic acid anhydrides in addition to the above-mentioned components (a), (b-2), (c) and (d).
• the silane coupling agents used are preferably those of the organic type.
• useful silane coupling agents are, for example, vinyl trichlorosilane, vinyl triacetoxysilane, vinyl triethoxysilane, vinyl tri( ⁇ -methoxyethoxy)silane, ⁇ -­methacryloxypropyl trimethoxysilane, ⁇ -methacryloxypropyl tri(trimethylsiloxy)silane, ⁇ -methacryloxypropyl pentamethyldisiloxane, ⁇ -(3,4-epoxycyclohexyl)ethyl trimethoxysilane, ⁇ -glycidyloxyprophl trimethoxysilane, mercaptopropyl trimethoxysilane, ⁇ -ureidopropyl triethoxysilane, etc.
• silane coupling agents those which are preferably used are ⁇ -methacryloxypropyl trimethoxysilane, ⁇ -methacryloxypropyl tri(trimethylsiloxy)silane and ⁇ -methacryloxypropyl pentamethyl disiloxane.
• Such silane coupling agents are preferably used after having been dissolved or dispersed in alcohols such as methanol, ethanol, etc., ketones such as acetone, methyl ethyl ketone, etc., or organic solvents such as methyl methacrylate which is a polymerizable monomer as will be mentioned later.
• alcohols such as methanol, ethanol, etc.
• ketones such as acetone, methyl ethyl ketone, etc.
• organic solvents such as methyl methacrylate which is a polymerizable monomer as will be mentioned later.
• the first acidic compound used is at least one compound selected from among organic carboxylic acids, organic carboxylic acid anhydrides, inorganic acids, sulfonic acids and organic phosphoric acids.
• organic carboxylic acids there may be used any of unsaturated and saturated carboxylic acids.
• carboxylic acids include, for example, chromenic acid, linolic acid, undecenoic acid, cinnamic acid, sorbic acid, cumaric acid, maleic acid, citraconic acid, p-vinylbenzoic acid, 4-methacryloxyethyltrimellitic acid, etc.
• aliphatic carboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid, lauric acid, stearic acid, pyruvic acid, methoxyacetic acid, acetoacetic acid, etc.
• aromatic carboxylic acids such as benzoic acid, phenylacetic acid, salicylic acid, etc.
• hydroxycarboxylic acids such as glycolic acid, lactic acid, etc.
• dicarboxylic acids such as oxalic acid, succinic acid, adipic acid, tartaric acid, maleic acid, fumaric acid, phthalic acid, etc.
• vinylcarboxylic acids such as acrylic acid, methacrylic acid, vinylacetic acid, etc.
• inorganic acids there may be used sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid, hydrogen fluoride, hydrogen bromide, hydrogen iodide, pyrophosphoric acid, tripolyphosphoric acid, phosphonic acid, etc.
• organic sulfonic acids there may be used alkylsulfonic acids such as methanesulfonic acid, ethanesulfonic acid, etc., arylsulfonic acids such as benzenesulfonic acid, toluenesulfonic acid, naphthalenesulfonic acid, etc., polysulfonic acids such as benzenedisulfonic acid, toluenedisulfonic acid, etc., and vinylsulfonic acids such as styrenesulfonic acid, 2-­acrylamide-2-methylpropanesulfonic acid, etc.
• alkylsulfonic acids such as methanesulfonic acid, ethanesulfonic acid, etc.
• arylsulfonic acids such as benzenesulfonic acid, toluenesulfonic acid, naphthalenesulfonic acid, etc.
• polysulfonic acids such as benzenedisulfonic acid
• organic phosphoric acids there may be used alkylphosphoric acids such as methylsulfonic acid, ethylsulfonic acid, etc., arylphosphonic acids such as phenylphosphonic acid, naphthylphosphonic acid, etc., acid phosphoric acid esters such as polyphosphoric acid, methylphosphoric acid, ethylphosphoric acid, phenylphosphoric acid, etc., and vinylphosphoric acids such as methacryloxyethylphosphoric acid, methacryloxyethylphenylphosphoric acid, etc.
• alkylphosphoric acids such as methylsulfonic acid, ethylsulfonic acid, etc.
• arylphosphonic acids such as phenylphosphonic acid, naphthylphosphonic acid, etc.
• acid phosphoric acid esters such as polyphosphoric acid, methylphosphoric acid, ethylphosphoric acid, phenylphosphoric acid, etc.
• vinylphosphoric acids such as meth
• the first acidic compounds as exemplified above are preferably used after having been dissolved or dispersed in alcohols such as methanol and ethanol, ketones such as acetone and methyl ethyl ketone, or organic solvents such as methyl methacrylate which is a polymerizable monomer as will be mentioned later.
• alcohols such as methanol and ethanol
• ketones such as acetone and methyl ethyl ketone
• organic solvents such as methyl methacrylate which is a polymerizable monomer as will be mentioned later.
• Useful metal salts are ferric chloride (FeCl3), magnesium chloride (MgCl2), zinc chloride (ZnCl2), aluminum chloride (AlCl3), stannous chloride (SnCl2), stannic chloride (SnCl4), zirconium chloride (ZnCl4), molybdenum chloride (MoCl5), nickel chloride (NiCl2), cobalt chloride (CoCl2), cupric chloride (CuCl2) and the like.
• FeCl3 ferric chloride
• MgCl2 magnesium chloride
• ZnCl2 zinc chloride
• AlCl3 aluminum chloride
• SnCl2 stannous chloride
• SnCl4 stannic chloride
• ZnCl4 zirconium chloride
• MoCl5 molybdenum chloride
• NiCl2 nickel chloride
• CoCl2 cobalt chloride
• CuCl2 cupric chloride
• Such metal salts as exemplified above are preferably used after having been dissolved or dispersed in water alcohols such as methanol and ethanol, ketones such as acetone and methyl ethyl ketone, or organic solvents such as methyl methacrylate which is a polymerizable monomer as will be mentioned later.
• alcohols such as methanol and ethanol
• ketones such as acetone and methyl ethyl ketone
• organic solvents such as methyl methacrylate which is a polymerizable monomer as will be mentioned later.
• the second acidic compound used is selected from the group consisting of organic carboxylic acids and organic carboxylic acid anhydrides. In the present adhesives for ceramics, however, this second acidic compound is not used singly but is used in combination with the aforesaid metal salt.
• Useful organic carboxylic acids and organic carboxylic acid anhydrides include those which are the same as the first acidic compounds as aforesaid.
• the polymerizable monomer is used in the adhesives for ceramics of the present invention.
• Widely usable polymerizable monomers for the purpose intended include vinyl compounds which are capable of polymerization.
• Particularly useful compounds as the polymerizable monomers include those as exemplified hereinafter.
• Halogenated vinyl compounds such as vinyl chloride and vinyl bromide; vinyl esters such as vinyl acetate and vinyl propionate; vinyl ethers such as methyl vinyl ether, ethyl vinyl ether and isobutyl vinyl ether; alkenyl benzenes such as styrene, vinyl toluene, ⁇ -methylstyrene, chloromethylstyrene and stilbene; alkyl esters or glycidyl esters of acrylic acid or methacrylic acid such as methyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, glycidyl methacrylate, 2-hydroxyethyl methacrylate and 3 hydroxypropyl methacrylate, diacrylic acid esters or dimethacrylic acid esters such as ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol and butylene glycol; triacrylic acid
• acrylic or methacrylic acid esters such as methyl methacrylate and the like.
• methyl methacrylate in combination with 4-­methacryloxyethyltrimellitic acid anhydride.
• polymerization catalysts are those which are capable of polymerizing and curing such polymerizable monomers as mentioned above at ordinary temperatures.
• Useful polymerization catalysts concretely include such compounds as listed below.
• trialkylboron Usable as the trialkylboron are concretely triethylboron, tripropylboron, triisopropylboron, tri-n-­butylboron, triisopropylboron, tri-n-amylboron, triisoamylboron, tri-sec amylboron and the like. Furthermore, usable are trialkylboron homologues which are obtained by partial oxidation of the trialkylborons indicated above.
• any organic peroxides are usable so long as they are usually used as polymerization initiators.
• favorably used are dibenzoyl peroxide, dilauryl peroxide, di-tert-butyl peroxide 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, tert-butyl hydroperoxide, tert-butylperoxybenzoate and the like.
• aromatic amines are preferably used.
• the aromatic amine referred to herein has at least one aryl group bonded to the nitrogen atom, and any of primary, secondary and tertiary amines is usable. Of these amines, particularly tertiary amines are preferred.
• tertiary amines are aniline, toluidine, xylidine, phenylenediamine, N,N-­dimethylaniline, N,N-diethylaniline, N,N-di( ⁇ -­hydroxyethyl)aniline, N,N-dimethyltoluidine, N,N-­diethyltoluidine, N,N-dimethylanisidine, N,N-­diethylanisidine, N,N-dimethyl-t-butylaniline, N,N-diethyl-­t-butylaniline, N,N-dimethyl-p-chloroaniline, diphenylamine, N,N-( ⁇ -hydroxyethyl)-p-toluidine and the like.
• tertiary amines having at least one electron donative substituent at the p-position of benzene ring.
• This visible ray polymerization initiators as used herein consist of ⁇ -ketocarbonyl compounds and amines or aromatic type nitrogen containing condensed ring compounds.
• ⁇ -ketocarbonyl compounds there may be exemplified ⁇ -diketone, ⁇ -ketoaldehyde, ⁇ -ketocarboxylic acid, ⁇ -ketocarboxylic ester and the like. More particularly, there may be shown ⁇ -diketones such as diacetyl, 2,3-pentadione, 2,3-hexadione, benzyl, 4,4 ⁇ -­dimethoxybenzyl, 4,4 ⁇ -diethoxybenzyl, 4,4 ⁇ -oxybenzyl, 4,4 ⁇ -­dichlorobenzyl, 4-nitrobenzyl, ⁇ -naphthyl, ⁇ -naphthyl, camphorquinone and 1,2-cyclohexanedione, ⁇ -ketoaldehydes such as methylglyoxal and phenylglyoxal, pyruvic acid, benzoylformic acid, phenylpyruvic acid,
• aromatic amines are preferable.
• Particularly favorable aromatic amines are substituted aromatic amines represented by the general formula [I] wherein R1 represents hydrogen atom, alkyl or hydroxylalkyl, R2 represents hydrogen atom, alkyl, hydroxylalkyl or aryl, and R3 represents acyl, carboxy, alkoxycarbonyl, hydroxylacyl, carbamoyl which may have a substituent, cyano, nitro or halogen atom.
• Such substituted aromatic amines concretely include 4-­dimethylaminobenzaldehyde, 4-diethylaminobenzaldehyde, 4-­(methylphenylamino)benzaldehyde, 4-( ⁇ -­hydroxyethylmethylamino)benzaldehyde, 4-­dimethylaminobenzoic acid, 4-diethylaminobenzoic acid, 4-­(methylphenylamino)benzoic acid, 4-( ⁇ -­hydroxyethylamino)benzoic acid, methyl 4-­dimethylaminobenzoate, methyl 4-diethylaminobenzoic acid, 4-(methylphenylamino)benzoate, propyl 4-( ⁇ -­hydroxyethylamino)benzoate, phenyl 4-­dimethylaminobenzoate, 4-dimethylphthalic acid, dimethyl 4-­dimethylaminoisophthalate, N,N-dimethylcyanoaniline, N,N-­di
• 4-dialkylaminobenzaldehydes 4-dialkylaminobenzoic acids
• 4-dialkylaminobenzoic acid esters 4-dialkylaminobenzoic acid esters
• N,N-dialkyl-p-­cyanoanilines and particularly preferable are 4-­diethylaminobenzoic acids.
• aromatic type nitrogen containing condensed ring compound which is used as the other component of the visible ray polymerization initiator
• favorable are those represented by the general formula [II] wherein X represents NR2, oxygen atom or sulfur atom, Y represents hydrogen atom, -SR3 or monovalent to trivalent metal, R1 represents alkyl, aryl, aralkyl or halogen atom, n represents an integer of from 0 to 4, when n is 2 or more R1 may be the groups different from one another, R2 represents hydrogen atom, alkyl, aryl or aralkyl, and R3 represents alkyl, aryl or the group represented by the general formula [III] wherein X, R1 and n are as defined above.
• aromatic type nitrogen containing condensed ring compounds examples include 2-mercaptobenzimidazole, 2-mercaptobenzoxazole, 2-­mercaptobenzothiazole, 2-mercaptomethylbenzimidazole, 2-­mercaptomethylbenzoxazole, 2-mercaptomethylbenzothiazole, dibenzoxazyl disulfide, dibenzothazyl disulfide, 2-­(phenylthio)benzothiazole, and metal salts thereof, e.g.
• 2-mercaptodimethylbenzimidazole 2-­mercaptodimethylbenzoxazole, 2-­mercaptodimethylbenzothiazole, etc.
• 2-mercaptobenzimidazole 2-­mercaptobenzoxazole, 2-mercaptobenzothiazole, 2-­mercaptomethylbenzothiazole, dibenzothiazyldisulfide, zinc (II) salt of 2-mercaptobenzimidazole, zinc (II) salt of 2-­mercaptobenzothiazole and zinc (II) salt of 2-­mercaptomethylbenzothiazole.
• 2-mercaptobenzothiazole 2-mercaptomethylbenzothiazole, zinc (II) salt of 2-mercaptobenzothiazole, and zinc (II) salt of 2-mercaptomethylbenzothiazole.
• the adhesives for ceramics of the present invention are sometimes incorportated, if necessary, with polymers, fillers and stabilizers, polymers which are incorporated in order to reduce polymerization contraction or to adjust viscosity include, for example, polymers or copolymers of monofunctional monomers such as polymethyl(meth)acrylate and polyethyl(meth)acrylate.
• the fillers are glass bead having a particle diameter of about 1-100 ⁇ m, alumina, ⁇ -quartz powder and colloidal silica.
• Useful stabilizers include hydroquinone monomethyl ether, t-butyl-p-cresol, hydroxymethoxybenzophenone, etc.
• aromatic sulfinates are salts of alkali metals, alkaline earth metals or amines.
• such salts include sodium benzenesulfinate, calcium benzenesulfinate, strontium benzenesulfinate, ammonium benzenesulfinate, benzenesulfinates such as benzenesulfinic acid triethylammonium salt and benzenesulfinic acid, N,N-dimethyl-p-toluidine salt, or salts of p-toluenesulfinic acid, ⁇ -naphthalenesulfinic acid, styrenesulfinic acid, etc.
• the aforementioned components (a), (b-1), (c) and (d) are preferably used in the following quantitative relationships.
• the silane coupling agent is preferably used in an amount of at least 5%, preferably 5-15% by weight based on the sum total weight of the aforesaid components (a), (b-­1), (c) and (d).
• the first acidic compound is preferably used in an amount of 0.01-2% by weight based on the sum total weight of the aforesaid components (a), (b-1), (c) and (d).
• the polymerizable monomer is preferably used in an amount of 95-43% based on the sum total weight of the aforesaid components (a), (b-1), (c) and (d).
• the polymerization catalyst is preferably used in an amount of 0.01-43% by weight based on the sum total weight of the aforesaid components (a), (b-1), (c) and (d).
• the components are preferably used in the following quantitative relationships.
• the silane coupling agent is preferably used in an amount of 1-15% by weight based on the sum total weight of the components (a), (b-2), (c) and (d).
• the metal salt is preferably used in an amount of 0.01-2% by weight based on the sum total weight of the components (a), (b-2), (b-3), (c) and (d).
• the second acidic compound is preferably used in an amount of 0.01-2% by weight based on the sum total weight of the aforesaid components (a), (b-2), (b-3), (c) and (d).
• the polymerizable monomer is preferably used in an amount of 99-43% by weight based on the sum total weight of the aforesaid components (a), (b-2), (b-3), (c) and (d).
• the polymerization catalyst is preferably used in an amount of 0.01-43% by weight based on the sum total weight of the aforesaid components (a), (b-2), (b-3), (c) and (d).
• step (1) is carried out, for example, by mixing a methyl methacrylate solution containing a silane coupling agent with an acetone solution containing a first acidic compound such as 4-methacryloxyethyltrimellitic acid or phosphoric acid, and applying the resulting mixture on the ceramic surface in such an amount that the amount of said silane coupling agent becomes at least 5% by weight based on the sum total weight of the aforementioned components (a), (b-1), (c) and (d).
• a first acidic compound such as 4-methacryloxyethyltrimellitic acid or phosphoric acid
• the ceramic surface is preferably abraded and cleansed prior to applying the liquid containing a silane coupling agent and an acidic compound. Cleansing the ceramic surface is effected, for example, by subjecting said surface to ultrasonic cleaning in an organic solvent such as acetone.
• the step (2) is effected, for example, by subjecting a liquid applied to the ceramic surface to air-­drying followed by air blow.
• the step (3) is effected by applying a liquid composition comprising a mixture of (c) a polymerizable monomer and (d) polymerization catalyst to a coat layer containing the silane coupling agent and acidic compound formed on the ceramic surface.
• the step (4) is effected by press bonding an adherend to the ceramic surface thus treated or by placing the adherend on said ceramic surface.
• the adherend to be bonded to the ceramic surface is preferably such metal as stainless steel or iron, or such ceramics as porcelain.
• a second process of the invention for bonding ceramics to an adherend by the use of a liquid composition comprising a mixture containing (a) a silane coupling agent, (b-1) the aforesaid first acidic compound, (c) a polymerizable monomer and (d) a polymerization catalyst, the amount of said silane coupling agent being at least 5% by weight based on the sum total weight of said components (a), (b-1), (c) and (d), has a characteristic feature that the process involves the following steps;
• a third process of the invention for bonding ceramics to an adherend by the use of a liquid containing (a) a silane coupling agent and (b-2) a metal salt and a mixture containing (c) a polymerizable monomer and (d) a polymerization catalyst, has a characteristic feature that the process involves the following steps;
• the step (1) is effected, for example, by applying to the ceramic surface a liquid prepared by mixing a methylmethacrylate solution containing a silane coupling agent with an acetone solution containing a metal salt such as ferric chloride.
• the ceramic surface is preferably abraded and cleansed in the same manner as mentioned previously, prior to applying the liquid containing the silane coupling agent and metal salt. Cleansing of the ceramic surface is effected, for example, by subjecting said surface to ultrasonic cleaning in an organic solvent.
• the step (2) is effected, for example, by subjecting a liquid applied to the ceramic surface to air-­drying followed by air blow.
• the step (3) is effected by applying a liquid composition comprising a mixture of (c) a polymerizable monomer and (d) a polymerization catalyst to a coat layer containing the silane coupling agent and metal salt formed on the ceramic surface.
• the step (4) is effected by press bonding an adherend to the ceramic surface thus treated or by placing the adherend on said ceramic surface.
• the adherend to be bonded to the ceramic surface is preferably such metal as stainless steel or iron, or such ceramics as porcelain.
• a fourth process of the invention for bonding ceramics to an adherend by the use of a liquid containing (a) a silane coupling agent and (b-2) a metal salt, and a mixture containing (c) a polymerizable monomer, (d) a polymerization catalyst and (b-3) the aforesaid second acidic compound, has a characteristic feature that the process involves the following steps;
• the step (3) is effected by dissolving the aforesaid acidic compound in the mixture of the polymerizable monomer and polymerization catalyst, and applying the resulting solution to the coat layer formed by the step (2).
• a fifth process of the invention for bonding ceramics to an adherend by the use of a liquid composition comprising a mixture containing (a) a silane coupling agent, (b-2) a metal salt, (b-3) the aforesaid second acidic compound if necessary, (c) a polymerizable monomer and (d) a polymerization catalyst, has a characteristic feature that the process involves the following steps;
• Dental ceramic powder (produced and sold by Vita Co. under a trade name of VMK 68) was molded into a block of 10 mm x 10 mm x 5 mm, and the block was then abraded on the surface thereof while showering with water to a level of Emery Paper #600. After having been washed with water for 1 minute, this sample was dried by air blow. An adhesive surface having a specified surface area was formed on the surface of the sample by quickly applying to the sample surface a cellophane adhesive tape of 0.1 mm in thickness having perforated a hole of 5 mm in diameter.
• adhesion force between the stainless steel and ceramics was measured by using a tensile strength tester Autograph IM-­500 manufactured and sold by Shimadzu Seisakusho Ltd., at a speed of 2 mm/min. The measurement was conducted 6 times under the same conditions, and an average value of the measured values was taken as an adhesion strength.
• the adhesion strength was 247 kg/cm2.
• the silane coupling agent is present in an amount of 6% by weight based on the sum total weight of the components(a), (b-1), (c) and (d) as defined in the present invention.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeating Example 1 except that an MMA solution having dissolved therein 5% by weight of 4-META (4-­methacryloxyethyltrimellitic acid anhydride) was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• 4-META 4-­methacryloxyethyltrimellitic acid anhydride
• An average value of adhesion strength was 314 kg/cm2.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeated Example 1 except that an ethanol solution containing 0.5% by weight of H3PO4 as the first acidic compound, and an MMA solution having dissolved therein 5% by weight of 4-­META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of the adhesion strength was 300 kg/cm2.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeating Example 1 except that 0.5% by weight of HCl was used as the first acidic compound, and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of the adhesion strength was 296 kg/cm2.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeating Example 1 except that 0.5% by weight of H2SO4 was used as the first acidic compound, and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 328 kg/cm2.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeating Example 1 except that the ethanol solution containing 4-methacryloxyethyltrimellitic acid as the first acidic compound was not used, and adhesion force therebetween was measured.
• An average value of adhesion strength was 79 kg/cm2.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeating Example 1 except that the ethanol solution containing 4-methacryloxyethyltrimellitic acid as the first acidic compound was not used and an MMA solution having dissolved therein 5% by weight of 4-META in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 69 kg/cm2.
• Example 2 In the same procedure as in Example 1, the stainless steel bar was bonded to the ceramics by repeating Example 1 except that an MMA solution containing 1% by weight of ⁇ -methacryloxypropyl trimethoxysilane was used in place of the MMA solution containing 6% by weight of ⁇ -methacryloxypropyl trimethoxysilane as the silane coupling agent, and adhesion force therebetween was measured.
• an MMA solution containing 1% by weight of ⁇ -methacryloxypropyl trimethoxysilane was used in place of the MMA solution containing 6% by weight of ⁇ -methacryloxypropyl trimethoxysilane as the silane coupling agent, and adhesion force therebetween was measured.
• An average value of adhesion strength was 150 kg/cm2.
• the silane coupling agent is present in an amount of 1% by weight based on the sum total weight of the components used in the adhesive of Example 1.
• Dental ceramic powder (produced and sold by Vita Co. under a trade name of VMK 68) was molded into a block of 10 mm x 10 mm x 5 mm, and the block was then abraded on the surface thereof while showering with water to a level of Emery Paper #600. After having been washed with water for 1 minute, this sample was dried by air blow. An adhesive surface having a specified surface area was formed on the surface of the sample by quickly applying to the sample surface a cellophane adhesive tape of 0.1 mm in thickness having perforated a hole of 5 mm in diameter.
• a 1:1 (volume ratio) mixture of an MMA solution containing 4% by weight of ⁇ -­methacryloxypropyl trimethoxysilane as a silane coupling agent and an ethanol liquid containing 0.5% by weight of FeCl3 as a metal salt was applied to the ceramic surface to form a coating film.
• the ceramic surface was subjected to air blow treatment to uniformly spread the coating film and the surplus coating film was removed therefrom and, at the same time, the coating film was dried.
• adhesion force between the stainless steel and ceramics was measured by using a tensile strength tester Autograph IM-500 manufactured and sold by Shimadzu Seisakusho Ltd., at a speed of 2 mm/min. The measurement was conducted 6 times under the same conditions, and an average value of the measured values was taken as an adhesion strength.
• the adhesion strength was 380 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an MMA solution having dissolved therein 5% by weight of 4-META (4-­methacryloxyethyltrimellitic acid anhydride) was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• 4-META 4-­methacryloxyethyltrimellitic acid anhydride
• An average value of adhesion strength was 400 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an ethanol solution containing 0.05% by weight of FeCl3 as a metal salt was used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 363 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an ethanol solution containing 0.5% by weight of ZnCl2 as a metal salt and an MMA solution having dissolved therein 5% by weight of 4-­META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 495 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an ethanol solution containing 0.5% by weight of SnCl2 as a metal salt was used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 445 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an ethanol solution containing 0.5% by weight of SnCl4 as a metal salt was used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 429 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an ethanol solution containing 0.5% by weight of ZrCl4 as a metal salt was used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 282 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that an ethanol solution containing 0.5% by weight of MoCl5 as a metal salt was used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 287 kg/cm2.
• Example 6 the stainless steel bar was bonded to the ceramics by repeating Example 6 except that a mixture system of dibenzoyl peroxide and N,N-dimethyl-o-toluidine was used as a polymerization catalyst in place of the TBB as the polymerization catalyst, and adhesion force therebetween was measured.
• An average value of adhesion strength was 200 kg/cm2.
• Example 6 the stainless steel bar was bonded to the ceramics by repeating Example 6 except that a mixture system of dibenzoyl peroxide and N,N-dimethyl-p-toluidine was used as a polymerization catalyst in place of the TBB as the polymerization catalyst and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• a mixture system of dibenzoyl peroxide and N,N-dimethyl-p-toluidine was used as a polymerization catalyst in place of the TBB as the polymerization catalyst and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 210 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that the ethanol solution containing FeCl3 as the metal salt was not used, and adhesion force therebetween was measured.
• An average value of adhesion strength was 79 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that the ethanol solution containing FeCl3 as the metal salt was not used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 69 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that no silane coupling agent was used and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 76 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that feldspar for artificial tooth was used in place of VMK 68 and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 340 kg/cm2.
• Example 6 In the same procedure as in Example 6, the stainless steel bar was bonded to the ceramics by repeating Example 6 except that silicon nitride was used in place of VMK 68 and an MMA solution having dissolved therein 5% by weight of 4-META was used in place of the MMA solution as the polymerizable monomer, and adhesion force therebetween was measured.
• An average value of adhesion strength was 350 kg/cm2.

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• 1987
  • 1987-06-05 EP EP87305001A patent/EP0252603A3/de not_active Withdrawn
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